Stack Overflow
Q&A for professional and enthusiast programmers
The Workplace
Q&A for members of the workforce navigating the professional setting
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Cross Validated
Q&A for statisticians, data analysts, data miners and data visualization experts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Physics
Q&A for active researchers, academics and students of physics
User Experience
Q&A for user experience researchers and experts
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Mathematics
Q&A for people studying math at any level and professionals in related fields
Academia
Q&A for academics and those enrolled in higher education
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Computer Science
Q&A for students, researchers and practitioners of computer science
Server Fault
Q&A for professional system and network administrators
Mi Yodeya
Q&A for those who base their lives on Jewish law and tradition and anyone interested in learning more
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Parenting
Q&A for parents, grandparents, nannies and others with a parenting role